Problem while downloading word document using Iframe in IE.

Problem while downloading word document using Iframe in IE.

Hi,

I have a button in my screen. On clicking that button , I want to pass control to action which will create word document and the user will see download window to download it in local directory. I have done this using Iframe and it is working fine in Mozilla, but is IE all version when I am clicking that button, I am getting 'Unknown Runtime error'. My code is as follows: